package com.tjjingpan.contactstest

import android.Manifest
import android.content.pm.PackageManager
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.provider.ContactsContract
import android.widget.ArrayAdapter
import android.widget.Toast
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {
    private val contactsList = ArrayList<String>()
    private lateinit var adapter:ArrayAdapter<String>

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        adapter = ArrayAdapter(this,android.R.layout.simple_list_item_1,contactsList)
        contactView.adapter= adapter
        if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS)
            != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this,
                arrayOf(Manifest.permission.READ_CONTACTS),1)
        }else{
            readContacts()
        }
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        when (requestCode) {
            1 -> {
                if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED)
                   readContacts()
                else {
                    Toast.makeText(this, "You denied the permission", Toast.LENGTH_SHORT).show()
                }
            }
        }
    }

    private fun readContacts(){
        //查询联系人数据
        contentResolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
            null,null,null,null)?.apply {
                while (moveToNext()){
                    //获取联系人姓名
                    val displayName = getString(getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME))
                    //获取联系人手机号
                    val number = getString(getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER))
                    contactsList.add("$displayName\n$number")
                }
            adapter.notifyDataSetChanged()
            close()
        }

    }
}